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Store procedure explanation

Could someone tell me what does this do?

-- GET JT NUMBER AND SALES ORDER STATUS
UPDATE #ForecastSolution
SET JTNumber = SDURAB
,OrderStatus = SDNXTR
FROM F42119
WHERE OrderNum = SDDOCO
AND SDURCD = 'JT'
AND SDURAB <> 0

ALTER PROCEDURE [dbo].[Acct_ForecastSolutionEvaluation]



AS
BEGIN
SET NOCOUNT ON;
--SET STATISTICS IO ON;
--SET STATISTICS TIME ON;


IF OBJECT_ID('TEMPDB..#ForecastSolution') IS NOT NULL
BEGIN
	DROP TABLE #ForecastSolution;
END

CREATE TABLE #ForecastSolution
(
	 OrderNum		INT
	,OrderType		VARCHAR(2)
	,SoldTo			VARCHAR(8)	
	,CustomerName	VARCHAR(40)
	,BusinessUnit	VARCHAR(12)
	,ShortItem		INT
	,LongItem		VARCHAR(25)
	,OrderStatus	VARCHAR(3)
	,JTNumber		INT
	,PubTypeCode	VARCHAR(4)
	,ProdPubType	VARCHAR(1975)
	,ConfigType		VARCHAR(8)
	,Description2	VARCHAR(1975)
	,Brand			VARCHAR(1975)
	,[PageCount]	VARCHAR(1975)
	,Qty			VARCHAR(1975)
	,ShippedQTY		DECIMAL(11,2)
	,RevenueJT		VARCHAR(1975)
	,ExtendedAmt	DECIMAL(11,2)
);


INSERT INTO #ForecastSolution(OrderNum,OrderType,SoldTo,CustomerName,BusinessUnit,ShortItem,ShippedQTY,Description2,ExtendedAmt,PubTypeCode)
SELECT
OrderNum
,OrderType
,AddressNum
,cName
,BusinessUnit
,ShortItemNum
,QuantityShipped
,DescriptionLine2
,ExtendedPrice
,ProdPubType
FROM dbo.Acct_SalesStatementRD
WHERE GL_Date >= '20140101'

-- ADD OPEN ORDER
-- FROM F4211



-- GET JT NUMBER AND SALES ORDER STATUS
UPDATE #ForecastSolution
SET JTNumber = SDURAB
,OrderStatus = SDNXTR
FROM F42119
WHERE OrderNum = SDDOCO
AND SDURCD = 'JT'
AND SDURAB <> 0

-- GET JT NUMBER AND SALES ORDER STATUS
UPDATE #ForecastSolution
SET JTNumber = SDURAB
,OrderStatus = SDNXTR
FROM F4211
WHERE OrderNum = SDDOCO
AND SDURCD = 'JT'
AND SDURAB <> 0

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SOLUTION